1. Product Overview

The square speaker magnet is made from high-performance NdFeB or ferrite material. It features a compact structure and stable magnetic output, optimized for various magnetic circuit designs in audio systems. Its square shape enables efficient space utilization and structural integration, making it particularly suitable for slim or compact speaker devices. Widely used in notebook speakers, tablet sound modules, and small Bluetooth speakers, the magnet supports customization in dimensions, magnetic orientation, and surface coating.

2. Technical Parameters

Product Name: Square Speaker Magnet
Magnet Grade: 45M (Br ≥13.8 KGs, Hcj ≥12.2 KOe)
Product Dimensions: D24-D12*2
Tolerance: Length ±0.05 mm, Width ±0.05 mm, Thickness ±0.05 mm
Operating Temperature: ≤ 100°C (High-temperature version customizable)
Density: ≥7.5 g/cm³
Surface Magnetic Field: 2900 GS (Measured using TM-801 Gauss meter)
Magnetic Flux: 2.9 mWb (Measured using a fluxmeter)

3. Manufacturing Process

- Wire Cutting: Molybdenum wire used for step-profile cutting, with ±0.03 mm precision (requires segmented programming).

4. Surface Treatment & Coating Technology

To enhance corrosion resistance and appearance:

Default Plating: Triple-layer Ni-Cu-Ni (customizable).

Standard Thickness: Ni (3μm) + Cu (5μm) + Ni (4μm).

Optional Plating: Single-layer Zn (5μm) for cost-sensitive projects.

5. Appearance & Dimensional Inspection Standards

To ensure product quality and reliability, all items undergo the following inspections:
» Manual Measurement with Micrometer/Caliper
» Visual Inspection (Light intensity: 800–1200 lumens, standard distance: 20–30 cm)
» 2D Optical Measuring System (For irregular or non-standard shapes)

6. Reliability Testing

6.1 High Temperature Demagnetization Test:
  - Magnets are placed in an 85°C oven with 85% humidity for 2 hours.
6.2 Mechanical Properties Test:
  - Includes tensile, compression, and bending tests to ensure strength and durability, preventing breakage or damage.

7. Packaging Process & Instructions

Our packaging methods follow magnetic material shipping standards:
» Eliminate products with defective appearance or dimensions
» Magnetize qualified products and arrange them neatly
» Boxed and labeled according to customer specifications
» Each box vacuum-packed with magnetic shielding and shock-absorbing pads
» Small boxes placed into outer cartons with moisture-proof, shock-resistant, and anti-magnetic interference design
Custom packaging available

8. Application Areas

· Tablet and notebook audio modules
· Bluetooth mini speakers and smart voice devices
· Small multimedia speaker systems
· Mobile audio and wearable sound devices
· Embedded speakers in automotive entertainment systems

9. Usage Precautions

- Handling: NdFeB is hard but brittle. Avoid dropping, impact, or chipping during handling.
- Safety: Strong magnetic force—avoid bending; sliding separation is recommended to prevent injury.
- Proper Installation: Identify polarity correctly before mounting to ensure normal device operation.
- Storage: Keep away from heat, humidity, acids, and alkalis. Ensure anti-moisture and anti-corrosion measures.
- Isolation: Strong magnetic fields may interfere with hard drives, IC cards, and pacemakers.

10. Customization & Services

- Support for custom sizes, shapes, and coatings (layer, thickness, color)
- Magnetic orientation and strength can be customized
- Laser engraving of logos or serial numbers
- Special packaging solutions and pull force testing for specific applications

11.Company Introduction

Dongguan Jinconn New Materials Holdings Co., Ltd specializes in the research, development, production, and sales of high-performance magnetic materials. Upholding the core philosophy of "Technology as the foundation, Quality as the soul," the company is committed to becoming a global leader in magnetic material solutions. Its products are widely used in cutting-edge fields such as new energy vehicles, intelligent manufacturing, electronic communications, automation equipment, and medical devices, earning strong recognition and trust from clients both domestically and internationally.